Permanently changing stock vehicle wheels?

How can I permanently change the stock wheels a vehicle spawns with? There is a set of wheels I like from Los Santos Customs that I want to always spawn on the Granger, even on NPC Grangers in traffic.
From google I think it's a carvariations.meta change, but what would I need to add? And as the Granger is a base game vehicle and the carvariations file for that is a locked .ymt, could I just add it to an unlocked DLC .meta file? Any help massively appreciated!